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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avalia??o do potencial das fibras de Ceiba Pentandra (Kapok) e Calotropis Procera como adsorventes de petr?leo

Coelho, Mayara Patricia Galv?o 19 February 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-09T23:24:53Z No. of bitstreams: 1 MayaraPatriciaGalvaoCoelho_DISSERT.pdf: 2408849 bytes, checksum: 1bd70b2df5eb96dd1157b144481399c7 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-11T22:43:11Z (GMT) No. of bitstreams: 1 MayaraPatriciaGalvaoCoelho_DISSERT.pdf: 2408849 bytes, checksum: 1bd70b2df5eb96dd1157b144481399c7 (MD5) / Made available in DSpace on 2016-03-11T22:43:11Z (GMT). No. of bitstreams: 1 MayaraPatriciaGalvaoCoelho_DISSERT.pdf: 2408849 bytes, checksum: 1bd70b2df5eb96dd1157b144481399c7 (MD5) Previous issue date: 2015-02-19 / Diante da evolu??o humana e do aumento populacional, fez-se necess?rio o surgimento de novas fontes de energia, o desenvolvimento de novos produtos e tecnologias. Um desses produtos, fruto da revolu??o industrial e de grande import?ncia para o desenvolvimento da humanidade, ? o petr?leo, uma subst?ncia composta basicamente de hidrocarbonetos que d?o origem a v?rios outros produtos como combust?veis, lubrificantes, pol?meros, solventes, g?s de cozinha, asfalto para estradas, fertilizantes, medicamentos, tintas, dentre outros. No entanto, o manuseio incorreto deste produto pode causar vazamentos e derramamentos que geram danos enormes para o meio ambiente e para a economia. Logo, com a finalidade de contribuir para amenizar est? problem?tica, neste trabalho de mestrado foi efetuada uma intensa pesquisa da poss?vel potencialidade das fibras de Ceiba Pentandra (L.) conhecida como ?Kapok? e Calotropis Procera como bioadsorventes de petr?leo. A escolha destas fibras deve-se a propriedades superficiais como oleof?licas/hidrof?bicas, sua flutuabilidade e ainda, serem pol?meros naturais biodegrad?veis presentes na regi?o nordeste do Brasil. Foi utilizado um planejamento experimental com metodologia de superf?cie de resposta (RSM) com o software Design Expert. Os resultados obtidos se mostraram eficientes estatisticamente, obtendo um R2= 0,9995 para a Calotropis Procera e um R2= 0,9993 para o Kapok no sistema est?tico; j? em sistema din?mico, foi obtido um R2= 0,9996 para a Calotropis e um R2= 0,9991para o Kapok. Ambas as fibras apresentaram uma efici?ncia na adsor??o, removendo mais de 80% do petr?leo da ?gua em estado est?tico e din?mico. / On the basis of human evolution and the population increase was necessary, the emergence of new sources of energy, the development of new products and technologies. One such product, object of the industry revolution and of great importance to the development of humanity is the oil, a substance composed primarily of hydrocarbons which give rise to several other products as fuels, lubricants, polymers, solvents, cooking gas, asphalt for roads, fertilizers, medicines, paints, among other. However, mishandling this product may cause leaks and spills that generate huge damages to the environment and the economy. Soon, with the purpose of contributing to decrease is problematic, in this master's work was carried out an intensive search of the possible potential of the fibers of Ceiba pentandra (L.) "Kapok" and Calotropis Procera as bioadsorbents of petroleum in water. The choice of these fibers is due to surface properties such as oleophylics and hydrophobic, their buoyancy and yet, being biodegradable natural polymers derived from the Brazilian Northeast. This research was used experimental planning with response surface methodology (RSM) with the software Design Expert. The results were statistically efficient, obtaining a R2= 0.9995 for Calotropis Procera and a R2= 0.9993 for Kapok. And that, both fibers showed adsorption efficiency, removing more than 80% petroleum in water static and dynamic state.

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